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Coolant and oil gauge not working

Tiny
BIGKEITH150
  • MEMBER
  • 1990 FORD F-150
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
Oil and coolant temp sender units have been changed. Instrument cluster has been changed with known good one. Cool ant and oil gauges still read dead. All low. No sweep.
Tuesday, October 13th, 2015 AT 1:56 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Pics show how to test gauges you need resistors and a ohm meter. You can get resistors if you have a radio shack around. See if senders are getting a low voltage signal or a flashing light with a test light. If not it's a wiring issue. I screwed u p on this and sent info for testing coolant instead of oil pressure but they test the same anyhow. Pics show color of wires to test
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Tuesday, October 13th, 2015 AT 3:39 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
CHECK FUSE # 18

ALSO CHECK TO SEE IF THERE IS VOLTAGE TO IT

THE MEDIC
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Tuesday, October 13th, 2015 AT 4:15 PM

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